Author: stepan Date: 2007-06-29 22:25:30 +0200 (Fri, 29 Jun 2007) New Revision: 420
Added: LinuxBIOSv3/include/spinlock.h Log: oops. forgot this.
Signed-off-by: Stefan Reinauer stepan@coresystems.de Acked-by: Stefan Reinauer stepan@coresystems.de
Added: LinuxBIOSv3/include/spinlock.h =================================================================== --- LinuxBIOSv3/include/spinlock.h (rev 0) +++ LinuxBIOSv3/include/spinlock.h 2007-06-29 20:25:30 UTC (rev 420) @@ -0,0 +1,45 @@ +/* + * This file is part of the LinuxBIOS project. + * + * Copyright (C) 2001 Linux Networx + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef SPINLOCK_H +#define SPINLOCK_H + +#if defined(CONFIG_SMP) && CONFIG_SMP == 1 +#include <arch/spinlock.h> +#else /* !CONFIG_SMP */ + +/* Most GCC versions have a nasty bug with empty initializers */ +#if (__GNUC__ > 2) +typedef struct { } spinlock_t; +#define SPIN_LOCK_UNLOCKED (spinlock_t) { } +#else +typedef struct { int gcc_is_buggy; } spinlock_t; +#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0 } +#endif + +#define barrier() do {} while(0) +#define spin_is_locked(lock) 0 +#define spin_unlock_wait(lock) do {} while(0) +#define spin_lock(lock) do {} while(0) +#define spin_unlock(lock) do {} while(0) +#define cpu_relax() do {} while(0) +#endif + +#endif /* SPINLOCK_H */